Viessmann VITODENS 300 Service Instructions Manual
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Viessmann VITODENS 300 Service Instructions Manual

Wall mounted gas fired condensing boiler. natural gas and lpg version. 4.2 to 13.0 kw
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VIESMANN
Service instructions
for heating engineers
Vitodens 300
Type WB3A, 4.2 to 13.0 kW
Wall mounted gas fired condensing boiler
Natural gas and LPG version
For applicability, see the last page
VITODENS 300
Please keep safe
5692 569 GB
1/2005

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Summary of Contents for Viessmann VITODENS 300

  • Page 1 VIESMANN Service instructions for heating engineers Vitodens 300 Type WB3A, 4.2 to 13.0 kW Wall mounted gas fired condensing boiler Natural gas and LPG version For applicability, see the last page VITODENS 300 Please keep safe 5692 569 GB 1/2005...
  • Page 2 Safety instructions Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. Safety instructions explained The system must be commissioned by the system installer or a qualified per- Danger son authorised by the installer. This symbol warns against the risk of injury.
  • Page 3 Ancillary components, spare and Use only original Viessmann spare wearing parts parts, or equivalent parts that have been approved by Viessmann. Please note Components which are not...

  • Page 4: Table Of Contents

    Index Index Initial start-up, inspection, maintenance Steps initial start-up, inspection and maintenance ........Further details regarding the individual steps ..........Coding Code 1......................39 Code 2......................42 Resetting codes to the delivered condition ..........61 Service scans Service level overview ................63 Temperatures, boiler coding card and brief scans ........
  • Page 5 Initial start-up, inspection, maintenance Steps initial start-up, inspection and maintenance For further information regarding individual steps, see the pages indicated. Commissioning steps Inspection steps Maintenance steps Page 1. Filling the heating system ..........2.
  • Page 6 Initial start-up, inspection, maintenance Steps initial start-up, inspection and . . . (cont.) Commissioning steps Inspection steps Maintenance steps Page 20. Cleaning the combustion chamber/heating surfaces and fitting the burner ........21.

  • Page 7: Initial Start-Up, Inspection, Maintenance

    Initial start-up, inspection, maintenance Further details regarding the individual steps Filling the heating system Please note Unsuitable fill water increases the level of deposits and corrosion and may lead to boiler damage. Thoroughly flush the entire heating system prior to filling it with water. Only use fill water of potable quality.

  • Page 8: Venting The Boiler

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Venting the boiler 1. Close the shut-off valves on the heating water side. 2. Connect the drain hose between top valve B and a drain outlet. 3. Open valves A and B, and vent at mains pressure until no sound of escaping air can be heard.

  • Page 9: Filling The Siphon With Water

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 2. Activate the venting program via 3. Check the system pressure. coding address "2F:1". Note To call up code 1 and for setting the coding address, see page 39. For function and sequence of the venting program, see page 101.

  • Page 10: Setting The Time And Date (If Required) Only For Weather-Compensated Control Units

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Setting the time and date (if required) only for weather- compensated control units Note During commissioning, or after prolonged time out of use, it may be necessary to set the time and date, if the time flashes in the display. 1.

  • Page 11: Changing The Gas Type (Only For Operation With Lpg)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Changing the gas type (only for operation with LPG) 1. Turn adjusting screw A (Allen screw 2.5 mm) on the gas combina- tion valve clockwise as far as possi- ble towards "...
  • Page 12 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Ignition Fault Check ignition module (control voltage 230 V across plugs "X2.1" and "X2.2" Gas combination Fault Check the gas valve opens combination valve (control voltage 230 V); check the gas supply pres- sure Ionisation cur-...

  • Page 13: Checking The Static And Supply Pressure

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the static and supply pressure Danger Higher CO emissions can lead to poisoning. Check the CO emissions before and after any work on gas appliances, to prevent any health hazards and to ensure the perfect operational condi- tion of the system.
  • Page 14 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 6. Check the supply (flow) pressure; it should be for natural gas 20 mbar, for LPG 50 mbar. Note Use suitable test equipment with a resolution of at least 0.1 mbar to test the supply pressure.

  • Page 15: Checking The Combustion Quality

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the combustion quality The electronic combustion control unit automatically ensures an optimum com- bustion quality. Only the combustion values need to be checked during commis- sioning and maintenance. For this, check the CO or O content.

  • Page 16: Setting The Maximum Output

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 4. Check the CO content. Should the actual value deviate by more than 1% from the above range, imple- ment the steps from page 15 (pos- sibly replace the burner). 5.

  • Page 17: Checking The Balanced Flue System For Soundness (Annular Gap Check)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 2. Press both K and F simulta- 5. Record the settings for maximum neously until "100" flashes on the output on the additional type plate display, (equals 100% of the rated included with the "technical docu- output) and "A"...

  • Page 18: Removing The Burner And Checking The Burner Gasket (Replace Gasket Every Two Years)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Removing the burner and checking the burner gasket (replace gasket every two years) 1. Switch OFF the control unit ON/ 5. Release four nuts G and remove OFF switch and the power supply. the burner.

  • Page 19: Checking The Burner Gauze Assembly

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the burner gauze assembly Replace the burner gauze assembly if the wire gauze is damaged. 1. Remove electrodes A. 4. Insert a new burner gauze assem- bly with a new gasket and secure 2.

  • Page 20: Checking And Adjusting The Ignition And Ionisation Electrodes

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking and adjusting the ignition and ionisation electro- A Ignition electrodes B Ionisation electrode 1. Check the electrodes for wear and 3. Check clearances. If the gaps are contamination. not as specified or the electrodes are damaged, replace and align the 2.

  • Page 21: Cleaning The Combustion Chamber/Heating Surfaces And Fitting The Burner

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Cleaning the combustion chamber/heating surfaces and fit- ting the burner 1. If required, clean heating surfaces A with a brush or flush with water. Please note Scratches on parts which are in contact with flue gases can lead to corrosion.

  • Page 22: Checking The Condensate Drain And Cleaning The Siphon

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 4. Check the gas connections for soundness. Danger Escaping gas leads to a risk of explosions. Check all fittings for sound- ness. 5. Connect the electrical cables/leads to each corresponding component. Checking the condensate drain and cleaning the siphon 1.

  • Page 23: Checking All Gas Equipment For Soundness At Operating Pressure

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 2. If the inlet pressure of the dia- 3. Top up your heating system with phragm expansion vessel is lower water and vent until the filling pres- than the static system pressure, sure of a cool system is 0.1 to 0.2 top up with nitrogen until the inlet bar higher than the inlet pressure...

  • Page 24: Checking The Ionisation Current

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the ionisation current 1. Pull the line off and connect test equipment (adaptor line available as accessory). 2. Adjust the upper output. Constant temperature control unit: Press K and d simultaneously for at least 2 s.

  • Page 25: Matching The Control Unit To The Heating System

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Matching the control unit to the heating system Note Subject to the equipment level, the control unit must be matched to the system. Various system components are recognised automatically by the control unit and the relevant codes are adjusted automatically.
  • Page 26 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 2 With/without DHW heating with one heating circuit without mixer A1 and one heating circuit with mixer M2. Note The volume flow of the heating circuit without mixer must be at least 30% greater than the volume flow of the heating circuit with mixer.
  • Page 27 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 3 With/without DHW heating with one heating circuit without mixer A1 and one heating circuit with mixer M2 and system separation Outside temperature sensor Maximum thermostat (underfloor Flow temperature sensor heating) Cylinder temperature sensor...
  • Page 28 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 4 With/without DHW heating with one heating circuit without mixer A1 with separate heating circuit pump and one heating circuit with mixer M2 Outside temperature sensor Power supply (extension kit) Flow temperature sensor aVG KM BUS Cylinder temperature sensor...
  • Page 29 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Required coding Address Operation with LPG 82:1 Max. speed of the internal circulation pump in heating 31:20 mode: 20% System design 5 With/without DHW heating with one heating circuit with mixer M2 (with extension kit), one heating circuit with mixer (Vitotronic 050) and low loss header Outside temperature sensor...
  • Page 30 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Required coding Address without DHW cylinder 00:3 Operation with natural gas (as delivered condition) 82:0 Operation with LPG 82:1 System design 6 With one heating circuit without mixer A1, solar collectors and Vitocell-W 100 DHW cylinder (type CVB) installed adjacent to the boiler Outside temperature sensor Vitosolic 100 or 200...

  • Page 31: Connecting The Weather-Compensated Control Unit Into The Lon System (E.g. With The Vitotronic 050)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Cylinder temperature sensor for High limit safety cut-out solar operation Stratification pump Cylinder temperature sensor (accessories) Required coding Address Set DHW temperature 3 at 40 °C (check delivered condi- 67:40 tion) Operation with natural gas (as delivered condition)

  • Page 32: Implementing A User Check (In Conjunction With The Lon System)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Single boiler system with Vitotronic 050 and Vitocom 300 Boiler control Vitotronic 050 Vitotronic 050 Vitocom unit User no. 1 User no. 10 User no. 11 User no. 99 Code "77: 1"...

  • Page 33: Adjusting The Heating Curve (Only For Weather-Compensated Control Units)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 1. Press L and d simultaneously for approx. 2 s. The user check has been initiated. 2. Select the required user with a and b. 3. Activate a check with d. A Consecutive number in the user "Check"...
  • Page 34 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) A Heating curve slope for underfloor B Heating curve slope for low tem- heating systems perature heating systems (according to the Energy Savings Order [Germany])
  • Page 35 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Changing slope and level 1. Change the slope with coding address "d3" in code 1 (see page 39). Adjustable value 2 to 35 (equals slope 0.2 to 3.5). 2. Change the level in coding address "d4"...
  • Page 36 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Adjusting the set room temperature Standard room temperature Press the following keys: 1. a "1r" flashes in the display 2. d to select heating circuit A1 (heating circuit without mixer) 3.

  • Page 37: Instructing The System User

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Reduced room temperature Press the following keys: 1. a "1r" flashes in the dis- play 2. d to select heating circuit A1 (heating circuit without mixer) 3. a "2r" flashes in the dis- play Example 2: Adjustment of the reduced room temperature from 5 °C to 14 °C...
  • Page 38 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Note Set code "24:1" and then code "24:0" if maintenance is carried out before main- tenance is displayed; the set maintenance parameters for hours run and inter- vals are then reset to 0. 1.

  • Page 39: Coding Code 1

    Coding Code 1 Calling up code 1 1. Press K and L simultaneously 3. Confirm the value with a or b; for approx. 2 s. confirm with d. The display briefly shows "Accepted", then the 2. Select the required coding address address flashes again.
  • Page 40 Coding Code 1 (cont.) Overview Coding Coding in the delivered condition Possible change System designs 00 :1 System design 1: 00 :2 System design 1.6: 1 heating circuit without 1 heating circuit without mixer A1, without DHW mixer A1, with DHW heat- heating 00 :3 System design 5:...
  • Page 41 Coding Code 1 (cont.) Coding in the delivered condition Possible change User no. 77:1 LON user number 77:2 LON user number, adjus- table from 1 to 99: 77:99 1-4 = boiler 5 = cascade 10 - ... = Vitotronic 050 99 = Vitocom Note Allocate each number...

  • Page 42: Code 2

    Coding Code 1 (cont.) Coding in the delivered condition Possible change Slope M2 d3:14 Heating curve slope = d3:02 Heating curve slope ad- justable from 0.2 to 3.5 d3:35 (see page 33) Level A1 d4:0 Heating curve level = d4: 13 Heating curve level ad- justable from 13 to 40 d4:40...
  • Page 43 Coding Code 2 (cont.) Function area Coding addresses System design Boiler/burner 06 to 54 Domestic hot water 56 to 73 General 76 to 9F Boiler circuit (heating circuit A1 without A0 to Fb mixer) Mixer circuit (heating circuit M2 with mixer) A0 to Fb Note Codes, which are irrelevant (due to the system equipment level or the setting of other codes) will not be displayed.
  • Page 44 Coding Code 2 (cont.) Coding in the delivered condition Possible change Boiler/burner 06:... Maximum limit of the 06:20 Maximum limit of the boil- boiler water tempera- er water temperature ture, defaulted by the 06:127 within the ranges de- boiler coding card faulted by the boiler 11: 9 No access to the coding...
  • Page 45 Coding Code 2 (cont.) Coding in the delivered condition Possible change 31:65 Set speed of the inter- 31:0 Set speed adjustable nal circulation pump from 0 to 100%. However, when operated as boiler 31:100 the boiler coding card de- circuit pump 65%, de- faults a minimum speed faulted by the boiler (e.g.
  • Page 46 Coding Code 2 (cont.) Coding in the delivered condition Possible change Boiler/burner 34:0 Influence of the signal 34:1 Influence of the signal "External demand" on "External demand" on the the circulation pumps: 34:23 circulation pumps: see All pumps in control the following table function Coding...
  • Page 47 Coding Code 2 (cont.) Coding Internal Heating cir- Heating cir- Cylinder primary pump circulation cuit pump cuit pump pump Heating cir- Heating cir- cuit without cuit with mixer mixer Control Control funct. Control funct. funct. Control Control funct. OFF funct. Control Control funct.
  • Page 48 65:... Information regarding 65:0 Without diverter valve the type of diverter 65:1 Diverter valve by valve (not adjustable) Viessmann 65:2 Diverter valve by Wilo 65:3 Diverter valve by Grund- Only for weather-compensated control units. Only for constant temperature control units.
  • Page 49 Coding Code 2 (cont.) Coding in the delivered condition Possible change 67:40 In conjunction with the 67:0 DHW set value adjusta- Vitosolic solar control ble from 0 to 60 °C unit: Set DHW value 3 67:60 6C:100 Set speed; internal cy- 6C:0 Set speed adjustable linder primary pump...
  • Page 50 Coding Code 2 (cont.) Coding in the delivered condition Possible change 7b:1 Send time via LON 7b:0 Do not send time via LON 7F:1 Detached house 7F:0 Apartment block Separate adjustment for holiday program and time program for DHW heat- ing, as option 80:1 With a 5 second time...
  • Page 51 LON BUS to any connected Vitotronic 050. 98:1 Viessmann system 98:1 System number adjusta- number (in conjunction ble from 1 to 5 with monitoring of sev- 98:5...
  • Page 52 Coding Code 2 (cont.) Coding in the delivered condition Possible change 9C:20 Monitoring LON users 9C:0 No monitoring When there is no re- 9C:5 The time is adjustable sponse from a user, va- from 5 to 60 min lues defaulted inside 9C:60 the control unit continue to be used for a further...
  • Page 53 Coding Code 2 (cont.) Parameters Heating circuit pump Address A3:... ON at OFF at -10 °C -8 °C -9 °C -7 °C -8 °C -6 °C -7 °C -5 °C -6 °C -4 °C -5 °C -3 °C -4 °C -2 °C -3 °C -1 °C...
  • Page 54 Coding Code 2 (cont.) Coding in the delivered condition Possible change A5:5 With heating circuit A5:0 Without heating circuit pump logic function pump logic function (economy mode): Heat- A5:1 With heating circuit pump ing circuit pump OFF, if logic function: Heating the outside temperature A5:15 circuit pump OFF, if (see...
  • Page 55 Coding Code 2 (cont.) Coding in the delivered condition Possible change Boiler circuit, mixer circuit A6:36 Extended economy A6:5 Extended economy mode mode disabled is enabled, i.e. the burner A6:35 and heating circuit pump will be switched OFF and the mixer will be closed at a variable value, which is adjustable between 5 and 35 °C plus 1 °C.
  • Page 56 Coding Code 2 (cont.) Coding in the delivered condition Possible change A9:7 With pump idle time: A9:0 Without pump idle time Heating circuit pump A9:1 With pump idle time, ad- OFF in case the set justable from 1 to 15 value is changed (by A9:15 changing the operating...
  • Page 57 Coding Code 2 (cont.) Parameter ad- With heating circuit pump logic function: Heating cir- dress b5:... cuit pump OFF, if enabled RT > RT + 3 K; disabled RT < RT + 2 K actual actual enabled RT > RT + 2 K;...
  • Page 58 Coding Code 2 (cont.) Coding in the delivered condition Possible change E2:50 With remote control: E2:0 Display correction -5 K No display correction of the actual room tem- E2:49 Display correction -0.1 K perature E2:51 Display correction +0.1 K E2:99 Display correction +4.9 K E5:0 Without external vari-...
  • Page 59 Coding Code 2 (cont.) Coding in the delivered condition Possible change F1:0 Screed drying function F1:1 Screed drying function active (only for weather- adjustable in accordance compensated control F1:5 with five optional tem- unit). perature/time profiles (see page 102) Note Observe the screed sup- plier's instructions.
  • Page 60 Coding Code 2 (cont.) Coding in the delivered condition Possible change F8: 5 For the operation in re- F8:+10 Limit for raising the tem- duced room tempera- perature in reduced ture mode, the set room F8: 60 mode adjustable from temperature will be +10 to -60 °C raised (up to the tem-...

  • Page 61: Resetting Codes To The Delivered Condition

    Coding Code 2 (cont.) Coding in the delivered condition Possible change Mixer circuit F2:8 Time limit for party F2:0 No time limit for party mode 8 hours or exter- mode nal operating mode F2:1 Time limit adjustable from changeover via key 1 to 12 hours F2:12 F5:12...
  • Page 62 Coding Resetting codes to the delivered condition (cont.) 2. Press e. "Confirm Standard setting? Yes" with d. With a or b, "Standard setting? Yes" or "Standard setting? No" can be selected.

  • Page 63: Service Scans

    Service scans Service level overview Function Key combination Exit Page Temperatures, boiler cod- K and G simultaneously Press d ing card and brief scans for approx. 2 s. Relay test K and d simultaneously Press d for approx. 2 s. Max.
  • Page 64 Service scans Temperatures, boiler coding card and brief . . . (cont.) Slope A1 level A1 Slope M2 level M2 Adj. outside temperature The adjusted outside temperature can be reset Outside temp. actual to the actual outside temperature with e. Set boiler temperature Actual boiler temperature Set DHW temperature...
  • Page 65 Service scans Temperatures, boiler coding card and brief . . . (cont.) Display screen Brief scan 0: No ext. 0: No External 0 - 10 V hook-up demand ext. Display in % or oper- blocking ating 1: Ext. mode blocking change- active over...
  • Page 66 Service scans Temperatures, boiler coding card and brief . . . (cont.) Constant temperature control units 1. Press K and G simultaneously 2. Select the required scan with a or for approx. 2 s. Scanning is active. 3. Press d. Scanning is completed.

  • Page 67: Checking Outputs (Relay Test)

    Service scans Temperatures, boiler coding card and brief . . . (cont.) Display screen Brief scan Version Version Equipment (EEPROM) Burner control unit (EE- PROM) Variable Software speed version pump variable 0: w/o speed pump 1: Wilo 2: Grund- Checking outputs (relay test) Weather compensated control unit 1.
  • Page 68 Service scans Checking outputs (relay test) (cont.) Display Explanation DHW circ. pump ON Ext. extension Central fault ON Ext. extension Solar circuit pump ON Vitosolic Constant temperature control units 1. Press K and d simultaneously 2. Control relay outputs with a and for approx.

  • Page 69: Scanning Operating Conditions And Sensors

    Service scans Scanning operating conditions and sensors Weather compensated control unit 1. In case of two heating circuits 2. Press c. select the relevant one: Press a. 3. Select the required operating con- "1r" flashes on the display. dition scan with a or b. Select heating circuit A1 (heating circuit without mixer): 4.
  • Page 70 Service scans Scanning operating conditions and sensors (cont.) Operating condition display Explanation (subject to system equip- ment) Date Burner OFF or ON Int. pump OFF or ON Output 20 Int. output OFF or ON Internal extension Heating pump OFF or ON If an external extension or extension kit for one heating circuit with mixer is installed Cylinder pump ON or OFF...
  • Page 71 Service scans Scanning operating conditions and sensors (cont.) Operating condition display (sub- Explanation ject to system equipment) 263572 Burner hours run Burner starts 030529 001417 Hours run, solar circuit pump 002850 Solar energy in kW/h Reset hours run and burner starts after maintenance. The values can be reset individu- ally to "0"...

  • Page 72: Troubleshooting Fault Display

    Troubleshooting Fault display Fault display design A Fault display C Fault number B Fault symbol D Fault code The red fault indicator flashes for every fault. A fault in the burner control unit causes the display to show "E". Constant temperature control units In case of faults, the fault code and fault symbol will be displayed at the programming unit.

  • Page 73: Calling Up Fault Codes From The Fault Memory (Fault History)

    Troubleshooting Fault display (cont.) Room temperature sensor User fault Checking and acknowledging faults Note If an acknowledged fault is not removed, the fault message will be re-displayed after 24 h. Constant temperature control units Press the following keys: 2. d all fault messages are acknowledged simulta- 1.

  • Page 74: Fault Codes

    Troubleshooting Calling up fault codes from the fault memory (fault . . . (cont.) 2. a/b press for individual fault codes. Note All saved fault codes can be deleted with e. 1. G + d press simultaneously for approx. 2 s. 4.
  • Page 75 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Burner Boiler water Check the boiler blocked temperature water tempera- sensor lead ture sensor (see broken page 85). Mixer closes. Mixer circuit Check the flow M2 flow tem- temperature sen- perature...
  • Page 76 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Control mode Solar: Col- Check sensor. lector tem- perature sensor shorted out Control mode Solar: Col- Check sensor. lector tem- perature sensor lead broken Control mode Solar: Sen- Check sensor.
  • Page 77 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Control mode Communica- Check connec- tion error tions and replace program- the programming ming unit (in- unit, if necessary. ternal) Regulates as Internal fault Replace the con- if the outside trol unit.
  • Page 78 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Control mode Incorrect Replace the LON LON com- communication munication module. module Control mode Communica- Check connec- tion fault - tions and coding solar control address "54".
  • Page 79 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Control mode Communica- Check connec- tion fault tions and settings ext. exten- of coding address sion "2E". Control mode Communica- Replace the LON tion fault - communication LON com- module.
  • Page 80 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Burner Internal fault Check the ionisa- blocked tion electrode and leads. Check the flue gas system for soundness. Press "E" and re- place the control unit, if required.
  • Page 81 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Burner control Internal fault Replace the con- unit fault trol unit. Burner Internal fault Replace the con- blocked trol unit. Burner control Flue gas Check the heating unit fault temperature system fill level.
  • Page 82 Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Burner control The fuel Check the gas unit fault valve closes train. Check both too late. control paths. Press "E". Burner control Fan speed Check the fan, unit fault too low dur- check the fan...

  • Page 83: Repairs

    Troubleshooting Fault codes (cont.) Display Const. Weath.- System char- Cause Remedy fault comp. acteristics code Burner Strong inter- Start the boiler blocked or in a ference again. Switch fault state (EMC) field OFF the control nearby or unit, if the equip- faulty main ment will not re- start.
  • Page 84 Troubleshooting Repairs (cont.) 2. Test the resistance of the outside temperature sensor across term- inals "X3.1" and "X3.2" on the dis- connected plug and compare it with the curve. 3. Where actual values strongly devi- ate from the curve values, discon- nect the wires at the sensor and repeat test immediately at the sen- sor.
  • Page 85 Troubleshooting Repairs (cont.) Checking the boiler water temperature sensor, cylinder tem- perature sensor or the flow temperature sensor of the low loss header 1. Boiler water temperature sensor: Pull the leads off boiler temperature sensor A and check the resis- tance.
  • Page 86 Troubleshooting Repairs (cont.) 2. Check the sensor resistance and compare the actual values with the curve. 3. Replace the sensor in case of severe deviation. Danger The boiler water tempera- ture sensor is immersed in the heating water (risk of scalding).
  • Page 87 Troubleshooting Repairs (cont.) 1. Pull the leads from flue gas tem- perature sensor A. 2. Check the sensor resistance and compare it with the curve. 3. Replace the sensor in case of severe deviation.
  • Page 88 Troubleshooting Repairs (cont.) Checking the temperature limiter If the burner control unit cannot be reset after a fault shutdown, although the boiler water temperature is below approx. 75 °C: Pull the leads off temperature limiter Check the continuity of the tempera- ture limiter with a multimeter.
  • Page 89 Troubleshooting Repairs (cont.) Checking the fuse 1. Switch OFF the power. 3. Remove cover A. 2. Release the lateral closures and 4. Check fuse F1. pivot the control unit down.
  • Page 90 Troubleshooting Repairs (cont.) Extension kit for heating circuit with mixer Checking the rotational direction of the mixer motor 1. Switch the ON/OFF switch at the motor first OFF and then ON again. The device will carry out the follow- ing self-test: Mixer close (150 s) Pump ON (10 s) Mixer open (10 s)
  • Page 91 Troubleshooting Repairs (cont.) Checking the Vitotronic 050 (accessories) The Vitotronic 050 is connected to the control unit via the LON system. To test the connection, implement a user check at the boiler control unit (see page 32). Changing the combustion control parameters The parameters are changed via the coding addresses in code 2.
  • Page 92 Troubleshooting Repairs (cont.) Coding in the delivered condition Possible change 82:0 Operation with natural 82:1 Operation with LPG 83:15 Ignition start gas vo- 83:0 Start gas volume adjusta- lume 15% ble from 0 to 31% 83:31 84:0 Start capacity correc- 84: 8 Start capacity correction tion 0%...

  • Page 93: Function Description

    Function description Constant temperature control unit Heating mode The selected set boiler water tem- DHW heating perature will be maintained when a DHW heating will be activated if the demand is being raised by the room cylinder temperature is 2.5 K below temperature-dependent clock thermo- the set cylinder temperature.

  • Page 94: Weather Compensated Control Unit

    Function description Constant temperature control unit (cont.) H Emissions test function K Boiler water temperature Weather compensated control unit Heating mode DHW heating The control unit determines a set boil- DHW heating will be activated if the er water temperature subject to the cylinder temperature falls 2.5 K below outside temperature or room tempera- the set cylinder temperature.
  • Page 95 Function description Weather compensated control unit (cont.) A Time program, heating circuit H Party mode B Time program, DHW K Standard setting and DHW circulation (if connected L Confirmation to the control unit) M Setting values C Holiday program N DHW temperature D Information O Emissions test function E Heating programs...

  • Page 96: Extensions For External Connections (Accessories)

    Function description Extensions for external connections (accessories) Internal extension H1 The internal extension is integrated DHW circulation pump (code 53:1) into the control unit housing. The fol- Heating circuit pump for a heating lowing alternative functions can be circuit without mixer (code 53:2) connected to relay output sK.
  • Page 97 Function description Extensions for external connections . . . (cont.) Internal extension H2 The internal extension is integrated Central fault message (code 53:0) into the control unit housing. The fol- Cylinder primary pump (coding lowing alternative functions can be 53:3) connected to relay output sK.
  • Page 98 Function description Extensions for external connections . . . (cont.) External extension H1 The external extension is connected External blocking to the boiler control unit via the KM (terminals 2 - 3) BUS. The following functions can be External demand controlled or processed simulta- (terminals 1 - 2) neously via the extension:...
  • Page 99 Function description Extensions for external connections . . . (cont.) External extension H2 The external extension is connected External blocking to the boiler control unit via the KM (terminals 2 - 3) BUS. The following functions can be External demand controlled or processed simulta- (terminals 1 - 2) neously via the extension:...

  • Page 100: Control Functions

    Function description Control functions External operating mode changeover The "External operating mode chan- geover" function is connected via external extension input "aVD". Cod- ing address "91" enables the selec- tion, which heating circuits the heating program changeover should affect: Coding The operating mode changeover af- fects: 91:0...
  • Page 101 Function description Control functions (cont.) The operating mode changeover remains active for as long as the con- tact remains closed, however at least as long as the duration selected in coding address "F2". External blocking The "External blocking" function is In coding address "32"...
  • Page 102 Function description Control functions (cont.) Filling program Note Afterwards, the changeover valve can Close the gas shut-off valve when be moved via coding address "2F:2" operating the filling program. into its central position. If, in this posi- tion, the control unit is switched OFF, In the delivered condition, the chan- then the system can be filled comple- geover valve is set to its central posi-...
  • Page 103 Function description Control functions (cont.) Temperature profile: Diagram 1 (DIN 4725 part 4) code "F1:1" Temperature profile: Diagram 2 (ZV parquet and flooring technology) code "F1:2" Temperature profile: Diagram 3 code "F1:3"...
  • Page 104 Function description Control functions (cont.) Temperature profile: Diagram 4 code "F1:4" Temperature profile: Diagram 5 code "F1:5" Temperature profile: Diagram 6 code "F1:6" (delivered condition)

  • Page 105: Electronic Combustion Control Unit

    Function description Electronic combustion control unit The electronic combustion control unit To check the combustion quality, the of the Vitodens 300 utilises the physi- content or the O content of the cal correlation between the size of the flue gas is measured. The actual ionisation current and the air factor .

  • Page 106: Designs

    Designs Connection and wiring diagrams internal connections Main PCB Temperature limiter § Boiler water temperature sensor Ignition unit Ionisation electrode a-Ö Fan motor Flue gas temperature sensor a:Ö Modulation coil dÖ Stepper motor for diverter valve...

  • Page 107: Connection And Wiring Diagrams External Connections

    Designs Connection and wiring diagrams external connections Main PCB Power supply unit...
  • Page 108 Designs Connection and wiring diagrams external . . . (cont.) Optolink Cylinder temperature sensor Burner control unit (plug on the cable harness) Programming unit sÖ Internal circulation pump Coding card Gas solenoid valve Connection adaptor fÖ Power supply LON communication module Power supply accessories and ON/OFF switch Vitotrol 100...

  • Page 109: Parts Lists

    Parts lists Parts lists Spare parts information 053 Burner gauze gasket Quote the part and serial no. (see 058 Fan outlet gasket type plate) and the item number of the 059 Fan required part (as per this parts list). 060 Mixer Obtain standard parts from your local 061 Gas combination valve supplier.
  • Page 110 Parts lists Parts lists (cont.) 101 Cable harness 100/35/34 (aux- 152 Operating instructions for con- iliary earth) stant temperature mode 103 Adaptor, ionisation current test 153 Operating instructions for cable weather-compensated mode 150 Installation instructions 155 Touch-up spray paint, Vitowhite 151 Service instructions 156 Touch-up paint stick, Vitowhite A Type plate...
  • Page 111 Parts lists Parts lists (cont.)
  • Page 112 Parts lists Parts lists (cont.)
  • Page 113 Parts lists Parts lists (cont.)
  • Page 114 Parts lists Parts lists (cont.)
  • Page 115 Parts lists Parts lists (cont.)
  • Page 116 Commissioning/service reports Commissioning/service reports Setting and test values Set value Initial start-up Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4-57.5 mbar = for natural gas LL mbar 17.4-57.5 mbar = for LPG mbar 42.5-57.5 mbar Tick gas type...
  • Page 117 Commissioning/service reports Commissioning/service reports (cont.) Maintenance/ser- Maintenance/ Maintenance/ Maintenance/ser- vice service service vice...
  • Page 118 Commissioning/service reports Commissioning/service reports (cont.) Setting and test values Set value Maintenance/ service Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4-57.5 mbar = for natural gas LL mbar 17.4-57.5 mbar = for LPG mbar 42.5-57.5 mbar...
  • Page 119 Commissioning/service reports Commissioning/service reports (cont.) Maintenance/ser- Maintenance/ Maintenance/ Maintenance/ser- vice service service vice...
  • Page 120 Commissioning/service reports Commissioning/service reports (cont.) Setting and test values Set value Maintenance/ service Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4-57.5 mbar = for natural gas LL mbar 17.4-57.5 mbar = for LPG mbar 42.5-57.5 mbar...
  • Page 121 Commissioning/service reports Commissioning/service reports (cont.) Maintenance/ser- Maintenance/ Maintenance/ Maintenance/ser- vice service service vice...

  • Page 122: Specification

    Specification Specification Rated voltage: 230 V ~ Electronic tempera- Rated frequency: 50 Hz ture limiter setting: 82 °C (fixed) Rated current : 6.0 A~ Temperature limiter Safety class: setting: 100 °C (fixed) IP X 4 D to Line fuse (mains): max.

  • Page 123: Certificates

    Condensing boilers The product characteristics determined as system values for the product Vitodens 300 as part of EC type testing according to the Efficiency Direc- tive (see specification table), can be utilised to assess the energy consumption of heating and ventilation equipment to DIN V 4701 10 which is specified by the EnEV [Germany].

  • Page 124: Manufacturer's Certificate According To The 1St Bimschv [Germany]

    Certificates Manufacturer's certificate according to the 1st BImSchV [Germany] We, Viessmann Werke GmbH&Co KG, D-35107 Allendorf, confirm that the fol- lowing product meets the NO limits specified by the first BImSchV paragraph 7 (2) [Germany]. Vitodens 300 Allendorf 18.01.05 Viessmann Werke GmbH&Co KG...

  • Page 125: Keyword Index

    Keyword index Keyword index Acknowledging a fault display Fault display design ......Adjusting the room temperature Fault history .
  • Page 126 Keyword index Keyword index (cont.) Operating mode changeover Temperature limiter ..Outside temperature sensor Thermocouple ........Temperature scans .
  • Page 128 Applicability Gas fired condensing boiler Type WB3A 4.2 to 13.0 kW from serial no. 7176 542 4 00001 Viessmann Werke GmbH&Co KG Viessmann Limited D-35107 Allendorf Hortonwood 30, Telford Telefon: +49 6452 70-0 Shropshire, TF1 7YP, GB Telefax: +49 6452 70-2780 Telephone: +44 1952 675000 www.viessmann.com...

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